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Question
Explain the solubility of hydroxides of alkaline earth metals and alkali metals
Explain the solubility of hydroxides of alkaline earth metals and alkali metals
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Solution
The hydroxides of s-block elements are highly soluble in water except lithium hydroxide. Generally solubility of hydroxide increases down the group. As we move down the group the size of atom increases this leads to easily breaking of M-OH bond.
The hydroxides of alkali metals are more soluble than those of alkaline earth metals. This is due to the high lattice energies of alkaline earth metals. Their higher charge densities (as compared to alkali metals) account for higher lattice energies.
The solubility of hydroxides increases in the following way.
Be(OH)2< Mg (OH)2< Ca(OH)2< Ba(OH)2
The size of the metal ion increases in the order Be < Mg < Ca < Ba.
The hydroxides of s-block elements are highly soluble in water except lithium hydroxide. Generally solubility of hydroxide increases down the group. As we move down the group the size of atom increases this leads to easily breaking of M-OH bond.
The hydroxides of alkali metals are more soluble than those of alkaline earth metals. This is due to the high lattice energies of alkaline earth metals. Their higher charge densities (as compared to alkali metals) account for higher lattice energies.
The solubility of hydroxides increases in the following way.
Be(OH)2< Mg (OH)2< Ca(OH)2< Ba(OH)2
The size of the metal ion increases in the order Be < Mg < Ca < Ba.
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